Wire-drawing machine



W. D. PIERSON. WIRE nmwma mcmns.

. APPLICATION FILED MAR. l3. I9l9- 1,354,336, Patentedsept- 28, 1920.

3 SHEETS-SHEET l.

' IIIVENTOR 4 TTORIEY W. D. PIERSON.

WIRE DRAWING MACHINE.

APPLICATION FILED mm. 13. I9I9.

Patented Sept. 28, 192 0.

3 SHEETS-SHEET 2.

INVENTOR MMfl'erm I'M mom 1 W. D. PIERSON. WIRE nmwma MACHINE.

1,354,336. APPLICATION FILED IAR. I3. 1919. 28

3 SHEETS-SHEET 3- UNITED STATES PATENT OFFICE.

WILLIAM D. PIERSON, OF WATERBURY, CONNECTICUT, ASSIGNOR TO THE WATER-IBURY FARREL FOUNDRY & NECTICUT.

MACHINE COMPANY, A CORPORATION or CoN- WIRE-DRAWING MACHINE.

Specification of Letters Patent.

Patented Sept. 28, 1920.

Application filed March 13, 1919. Serial No. 282,899.

To all whom it may ooncm n- I Be it known that I, WIIJLIAM D. PmRsoN,

a citizefi of the United States of America,

and a resident of Waterbury, county of New Haven, and State ofConnecticut, have invented certain new and useful Improveaction oftreadle bar 34 ments in Wire-Drawing Machines, the prinin the followingdescription and accompanying drawings, wherein is disclosed the form ofthe invention which I now consider to be the best of the various formsin which said principles of the invention may be embodied.

This invention relates to improvements in wire-drawing machines orbenches and involves improvements particularly upon the wire-drawingmachine of United States Patent No; 1,025,421 of May 7, 1912. Theinvention comprises block-braking apparatus cooperating with theapparatus of the machine of the above patent for automatically releasingft he clutch from the wiredrawing block, and in minor features ofconstruction of said apparatus including the brake itself. The inventionhereof may be used in various modifications of wire-drawing machinesother than that of said prior patent.

Of the drawings, which show the machine of said prior patent with theinvention hereof embodied thererhTRigure 1 is a plan and Fig. 2 a frontelevation of the relevant parts of the machine showing the rotatablewiredrawing block or wire-winding drum 11 with inclosing top cover 48and bottom flange 101; also the table 1 on which are mounted said block11 and the die-holder X; said table 1 being supported by legs 2 (Fig.5). Fig. v3 is a plan View showing certain novel details of theapparatus for tripping or releasing the power clutch mechanlsm in.-

closed in block 11 of'Fi s1 and 2, through which in turn operates thebrake motion on the Wire drawing block, see Figs. 5 to 10. (A frontelevation of said tripping apparatus of Fig. 3 is shown in Fig. 2).

Fig. 4 is a side elevation of part of the tripping mechanism of Figs.and 3, sald part illustrating also the operation of "the controllingtreadle 34X by the tripping mechanism, this treadle being the samecontrolling part by which the internal coil clutch and the brake areapplied alternately to block 11 as shown in Fig. 5

Fig. 5 is a transverse Vertical section through the entire machine (saveblock 11 wherein the clutch mechanism is shown in dotted lines) showinthe operating treadle or control lever 34 (which is also shown in Fig. 7and partially in Fig. 2), and showmg also the connections whereby saidtreadle operates the coil-clutch 15 inclosed in block 11, and theconnections whereby said treadle operates the brake 100 shown intransverse vertical section at the upper right of the Fig. 6 is a rearelevation of the mechanlsm of Fig. 5 showing the details of the brake ofFig. 5 in section atthe upper part.

Fig. 7 is a plan partly in section of the treadle or control lever 34Xof Figs. 2 and 5, together with the supports for this treadle and forthe parts operated by it.

Fig. 8 is a plan of the brakev with cover removed to show the'insidebrakingmechanism shown also in Figs. 5 and 6.

Fig. 9 is a horizontal section of the arrangement of pin 86 of Fig. 5;and

Fig. 10 is a horizontal section of the arrangement of pin 75 of Fig. 5.

Figs. 11 and 12 illustrate a modified construction of the brake havingan operation similar to the construction shown in the Figs. 5, 6 and 8,this construction being preferable in some cases.

The driving means (shown in Fig; 5 center from top to bottom) for thewire-drawing block 11 may be and is indicated as the same as in saidprior patent. It is described briefly hereinafter. In this invention thecontrollever or treadle bar 34X (Figs. 5, 2 and 7) is the mid-point ofthe system of control connections for power and brake. The two ends ofsaid system controlled by treadle 34X are (1) the brake 100 (Fig; 5upper right) and (2) the die holder 55 r of Figs. 1 and 2 starting withthe treadle 34X as the mid-point between the two as shown at the pulledto the htand coiled around block 11 in its anti-c ockwise rotationindicated by arrow. (The wire-grip is shown at 51 in said prior patent).The connections by which the tripping mechanism of Fig. 2 operates toautomatically disconnect the power from and apply the brake to the block11 are shown in Fig. 5 and include treadle bar 34X and parts above it. j

- The object of the invention is to provide a practical tripping andbraking combination whereby the release of the drawing strain ondie-holder 55X will result automatically in a disconnection of thedriving means from the rotatable drawing-block or drum 11 and willresult in the braking of said block; and also to provide a constructionpermitting the brake to be released by the operator either with orwithout applying the power to rotate said block 11.

The block or drum 11 is shown in Figs. 1, 2 and 5, and the die-holder55X in Figs. 1 and 2. The drawing strain on die-holder 55X is releasedeither when the last of the wire has been drawn through the die or whenthe wire itself breaks in two. The block 11 (with the parts inside andmoving with it) is quite heavy and in its, operating rotation hasconsiderable moment of inertia so that when it is cut off from thedriving mechanism of Fig. 5 by the tripping mechanism of Fig. 2, itrotates freely unless braked, carrying with it the Wire-grip which fliesout from the block and also the projecting length of wire which thrashesaround during the continued rotation of the block and is liable toresult in injury to the operator or cause serious entanglement. Thebrake hereof. and its connections for automatic and manual operation aredesigned to apply the brake immediately ('Fig. 5) to flange 101 ofrotating block 11 in order to prevent the above evils and they alsoconstitute further improvements.

For simplicity the reference number system used herein, is as follows.Numbers up to andincluding 73 indicate that the parts to which they areapplied correspond generally in function with the parts of saidprior'patent which are numbered likewise; and of such numbers thosefollowed by an X indicate a modification of structure; and those numberswhich are not followed by an X indicate both structure and function asbefore. Certain numbers up to 73 are omitted thereby indicating thatparts in the prior patent so numbered are not here used.

Numbers higher than 7 3 indicate parts herein which are additional to,anything shown in the prior patent.

First consider the tripping connections on Figs. 1 and 2, whereby themovement of the die-holder operates treadle 34X to disengage the powerand apply the brake. In Fig. 1

on line O-116O) and Fig. 2 (on'line 57-O'), die holder 55X is shown infull lines in its drawing or operating position, i. 6. with the wiretangent to the block Fig. 1, and-(Fig. 2) against the shoulder ofblock-flange 101. The approximate starting position of said die-holder55X is (Fig. 1) along line S116S, and (Fig. 2) along line S'57S. Thedie-holder 55X has both horizontal movement (Fig. 1) and verticalmovement (Fig. 2). It is held in its operating positions (O116-O, Fig. 1and O-57-'-O, Fig. 2) by the drawing tension of the wire which is pulledthrough the die by the rotation of block 11. When the last or a brokenend of the wire has been pulled through the die toward the right, toblock 11, so that the drawing tension of die-holder 55X is removed, theweight 107, suitably located a on horizontal lever 106 to overbalancethe Weight of die-holder 55X with its die, etc., pulls down slide 110('Fig. 2), horizontal lever 106 moving from its operating position. 104Oto starting position 104-S. The location of starting position 104-.S isestablished by adjustment of screw 59 (Fig. 2) in lug 60 on die-holder55X, that is, the upward motion of the die-holder is stopped when thisscrew hits against the upper lug of bracket 58X. This limitin upperposition corresponds to line S57 in Fig. 2.

At 105 (Fig. 2) the horizontal rod 106 is received by a socket in theend of bell-crank lever 102 pivoted at 104 to supporting plate 37X ofthe machine. (This plate is shown in edge view in Figs. 4 and 5 and inhorizontal section in Fig. 7). Weight 107 depresses rod 106 operating onits pivot 104. In Fig. 2 bell crank lever 102 is shown in the positioncorresponding with the drawing or operating position of the othermovable parts in the figure, its lower end being connected by pin 103with a rocking lever 69X pivoted in plate37X at 68X. The lower end oflever 69X is provided with a screw 70 held in readiness to push treadle34X to the left by the automatic tripping operation so that said treadleis pushed out of engage ment under horizontal shoulder 40 of verti calslot 39. In the drawing operation of the machine the treadle 34X is heldunder said shoulder 40 by a spring pulling upwardly (41 in Fig. 5). InFig. 2.t he depression of horizontal rod 106 to the starting positionS104' moves bell crank lever 102 on its pivot 104 so that its lower endmoves to the right. This rocks lever 69X on its pivot 39 up which italso'results in the braking 68X so that its lower end moves to. the leftand screw 70 engages treadle 34X and ,the latter is forced to the leftinto vertical slot is pulled by s ring 41 into its uppe r position 34Xof ig. 2, which position corresponds with the starting positions S ofthe parts above specified. This upward movement of treadle 34X resultsin the disconnection of the driving means shownin Fig.5 from block 11,and of said block as the result of the consequent operation of theconnections from treadle 34X shown in Fig. 5 and now to be described.

In Fig. 5 is shown treadle 34X having a vertical motion in slot 39(Figs. 2 and 5) in supporting plate 37X, this being the plate on whichin Fig. 2 bell crank lever 102 and rocking lever 69X are pivoted. InFig. 5 treadle 34X is end at 84 to a leg or support 2 of the machine.Treadle 34X has two sets of operating connections, one to the drivingmeans for block 11 inside the same (dotted lines) and the other to brake100 which is applied to the periphery of flange on base 101 of block 11.Treadle 34X in its lowermost position causes the continuous applicationof the driving power to rotate block 11.. This is the position of thetreadle indicated at O -84, which corresponds to the drawing or,operating positions of the parts shown in Figs. 1 and 2 and there alsoindicated by the lines lettered O. In Fig. 5 the connections fromtreadle 34X to the coil clutch driving apparatus are the'turn-buckle 36Xhaving its lower end connected to treadle lever 34X and, its upper endconnected to the fork lever32X, the latter and all the rest of the powerapparatus being, if desired, of the same form as in said prior patentand operating to rotate drawing-block 11 by means of coil clutch 15inside said block, the power being applied'from main shaft 5, gear 9thereon and gear 8 on vertical shaft 7. When treadle 34X is in itslowermost position O84 (when it is held under shoulder 40) drawing block11 is being rotated by coil clutch-15 which is held in its clutchingposition by the connections from treadle 34X, which include turnbuckle36X lever 32X etc. As in said prior patent the fork-lever 32X is hingedat 33 to a leg or support 2 of the machine, and it operates the coilclutch 15 in block 11 by the mechanism shown in detail in saidprior-patent and shownhere generally in dotted lines in Fig. 5 asfollows: Lever 32X is forked to receive pins 31, which project from apart rotatably connected with hub 27 secured by pintle 28 to verticalrod 23 which reciprocates in the hollow interior of power shaft 7. Rod23extends up through the top of continuously rotating shaft 7 and at upperend of said shaft isa plate 24 secured pivoted at its extreme right tothe upper end of. rod rotate with shaft 7. When .rod 23 is pulled downinside shaft 7 by the depression of treadle 34X to its position'O84,said rod 23 depresses plate'24 sliding on shaft 7 to engage a lever 19and thereby cause coil 15 to clutch hub 14 which is fixed to shaft 7coil 15 being fixed to block 11 so that now shaft 7 is clutched via coil15 to block 11 and causes the rotation of the latter. Theclutch-operating position of fork lever 32X is indicated in Fig. 5 bythe line O33. The positions of the parts shown in Fig. 5 are thosecorresponding to the non-wiredrawing condition of the machine which isat rest save for the driving mechanism as far as and including shaft 7.For example, fork-liver 32X is shown in its position ready to startoperation of the machine, this position being indicated at S33. But itsposition which corresponds with the positions of the parts shown inFigs. 1 and 2 is at O-33 Fig. 5, and the corresponding position of thetreadle 34X is its lowest indicated at 0-84 in Fig. 5.

s soon as treadle 34X has been forced to the left (Fig. 2) from itslowest position in vertical slot 39 under shoulder 40, its spring 41(Fig. 5) pulls it up through slot 39. At this time fork-lever 32X ispulled up to the position shown in F ig. 5 by means of itsspring 78,which is secured at 80 to a downward projection added to lever 32X forthe purpose of receiving said spring 78 at the proper point. Connection36X between tradle 34X and fork lever 32X is in the form of aturn-buckle, in order to permit of adjustment. These modifications andalso the middle bend in treadle lever 34X for the purpose of clearingthe main shaft 5 and'its bearings are all made in relation to thebraking apparatus.

For clearness, Figs.- 1 and 2 which show the drawing operation positionsof die-holder 55X and its associated parts when the brake is notapplied. Similarly in Fig. 5 the wire-drawing parts (die-holder 55Xetc.) are omitted for clearness because they are not in operation whenthe brake is applied as shown in this Fig. 5. That the brake isappliedin Fig. 5 is indicated by the fact that tradle 34X is in its uppermostposition indicated by 23 and mounted to brake 100 is not shown in lineA84, the power being disconnected from block 11 when treadle 34X is inits uppermost position.

In Fig. 5 coil-clutch 15 is shown as remost treadle position along lineslettered A of the connection between treadle bar 34X and the brake asfollows: At the right, at 82 in treadle lever 34X is pivoted the lowerend of a turnbuckle 83,-the upper end of which is pivoted at 81 to alever 85 the other or left end of.which is keyed fast to a stud or pin86, which is mounted to oscillate in leg or support 2 of the machine(for details see Fig. 9). To said oscillating stud 86 is keyed fast alever 87, which extends upwardly through table 1 to the brakingmechanism mounted on top of table 1, and shown in section. The aboveparts in the position shown permit a spring application of the braketoward the left against bottom flange 101 of block 11 these positions ofthe operating levers being indicated by the line A- 86-*A. The lineO86-O indicates the positions of the above connections for the extremewithdrawn position of the brake which positions corres ond with thelower- 6 84-.-O corresponding to the drawing operation of the machine asshown in Figs. 1 and 2, when the dieholder 55X (Figs. 1 and 2) is in itsdrawing position wherein the end of the system operated by thedie-holder 55X (see screw 70, Fig. 2, lower right hand) remains at theright to permit treadle 34X to remain beneath shoulder A0 and hold thebrake in its released position.

The intermediate position of treadle 34X and of the brake connections inFig. 5, all lettered B, will now be described. The reason for theseintermediate positions is the desirability of permitting the operator inpreparing to start the machine, to release the brake before connectingblock 11 with the power mechanism which rotates it. If the brake bereleased while the first end of the wire is being secured in the grip ofblock 11, the operator can manually turn block 11 and swing it around tothe position most convenient for him to fasten the wire in the grip inblock 11. During this time die-holder 55X and its connections remain intheir upper positions along the lines lettered S in'Fig. 2, screw (Fig.2 lower right hand) being then located to the left of its positionshown, 71. 6., extending into the space shown as occupied by the lowerposition of treadle 34X. In order to change treadle 34X from itsintermediate position B-84 (Fig. 5) the operator depresses it untillatch 119, pressed toward the right by the operators toe, is engaged byits lug 120 in a small supplementary slot 123 (Flgs. 5

. and 2) at the top of vertical slot 39 in supporting plate 37X. Spring41 now holds the parts in this position; the operator can draw his footfrom the tread 124 of treadle bar 34X and attend to securing the wireend in the grip of block 11. During said partway depi" ession of treadle34X the driving means has not yet been connected to block 11 to rotateit, forthe reason that the turn buckle connection 36X has a looseconnection with treadle bar 34X consisting of a pin in the treadle barwhich plays in a slot 76 in turn-buckle 36X (for details see Fig. 10),-a set screw 118 adjusting the extent of looseness of this connection.Hence, with both power and brake disconnected, the operator can moveblock 11 freely while gripping the first end of the wire to it.

After the operator has completed the gripping of the wire to block 11,he may start the machine by further depression of treadle 34X fromitsintermediate position B84, Fig. 5, down to its lowest position 0-84,which corresponds with, the O positions of all the parts so markedinFigs. 1, 2, and 5. The small top slot 123 for lug 120 of latch 119 iscurved on its lower side (Figs. 5 and 2) so that as treadle 34X goesdown, the lug 120 goes down with it; and

as lug 120 moves down, it also moves to the,

left under action of spring 122, the whole latch 119 swinging to theleft on its pivot 121 and against the tread 124: of treadle bar 34X. (Onthis occasion of the operation of treadle 34X, the operators toe is, ofcourse, not pressed against latch 119.)

As treadle 3 1K now goes down toward its lowest position 0-84 its pin 75 engages the screw 118 in the lower end of the slot 76 in turn-buckle36X and by the operation of the latter the driving mechanism is clutchedto operate block 11 as described above, whereupon the wire to be drawnis put under tension die-holder 55X is moved into its drawing position 0(Figs. 1 and 2) and the various connections of Fig. 2 described areoperated by said movement of the clieholder with the result that screw70 (Fig. 2 lower right) moves to the right into the position in which itis shown, being moved out from under shoulder 40 so that treadle 34X isfree to be shoved by the operator sidewise from vertical slot 39 totheright to engage under shoulder 40. At this point the machine is left toits operation until such time as the drawing of the wire' is completed,or until the wire breaks, whereupon the above described cycle ofoperations is repeated, beginning with the automatic disconnection ofthe driving power and the automatic applir L v I plied to block 11, thisbeing the period of time when the operator is gripping the wire to block11.

Construction of die-holder, eta. I

These are ,the features shown in Figs. 1-4.

As shown in Fig. 2 the drawing-die marked Die is held against arms 54 ofdie-holder 55X by a screw operated by wheel 127. It is tliroughthis diethat the operator threads the pointed end of the wire which is thenpassed on to the grip in block 11. During the period when treadle 34X isin its intermediate position B84, Fig. 5, the die-holder 55X is instarting position S116S, Figs. 1 and 2, that is, after the wire has beengripped in block 11. When treadle 34X thereafter is depressed to itslowest point O-84 Fig. 5, then block 11 pulls the wire taut which pullsdie-holder 55X around (Fig. 1) until it occupies the drawing oroperating position O116O tangent to rotating block 11. To permit thismovement die-holder 55X is secured to swivel block 56 (Fig. 2) centeredon vertical pin 116 (Figs. 1 and 2) in bracket 58X adjustably secured totable 1 of the machine. The securing of die-holder 55X to swivel block56 is by means of horizontal pivot 57, in block 56 whereby when the wireunder tension swings the die-holder around on vertical pivot 116(Fig. 1) it also pulls it down around pivot 57 (Fig. 2) into its drawingposition 'O57O in Fig. 2. Hence die-holder 55X has the ability to movein two directions which is utilized in starting the machine as shown inFigs. 1

' and 2.

1 and 2) 55X to move vertically controls the dis- The following is theconstruction (Figs. whereby the ability of die-holder connection ofpower from block 11 and the application of the brake thereto by means ofthe connections in Figs. 2 and 5 hereinbefore described. The fixedbracket 58X (Fig. 2) is H-shaped, having top and bottom pairs of lugs113 extending to the left. The vertical space between said lugs isoccupied by vertical slide 110 which projects down through hole 117 intable 1 of the machine. A pin 111 extends through the portion of slide110 which lies between the upper and lower pairs of lugs 113 on fixedbracket 58X. The ends of said pin 111 are mounted in the ends of twoarms 115 of die-holder 55X. Said arms 115 are spaced apart (Fig. 1) soas to straddle fixed bracket 58X, and this construction permits theoperator when threading the end of the wire through the die to manuallyswing the die-holder freely toward him (without interference from fixedbracket 58X) and beyond the die-holders drawing position 0-116-0 of Fig.1 and 55X drops down and causes a position most convenient. for theopera-- tor. Then after having threaded the'wire through the die, theoperator may swing back the die-holder to permit him to grip to block 11the end of the wire rojecting through the die to the right. The verticalslide 110 (F i 2) is held in place between the pairs of lugs 113byvertical cover 114. Pin 111 in the ends of die-holder arms 115 movesup and down in the vertical space between the up er and lower pairs ofbracket lugs 113. '1 112 in vertical slide 110 which receives pin 111allows for the slight horizontal movement of said pin when die-holder55X swings vertically on its horizontal pivot 57 (Fig. 2). The lower endof slide 110 carries a pin 109 engaging in a slot in horizontal rod 106,this permitting an adjustment of fixed bracket 58X to right or leftalong table 1 in order to place the die end of the die-holder 55X thedesired distance from the grip in block 11. Horizontal rod 106 carries aweight 107 adjutable along its length and held thereto by set screw 108.

vIn the normal or drawing operation of the machine, weight 107 is tionshown, by the wire being drawn, which acts through the parts abovedescribed, but as soon as the drawing of the wire has been completed, orin case the wire breaks, then weight 107 counter-balancing die-holderthe arts to assume their starting positions (Figs. 1 and 2) by way ofthe pulling down of slide 110 and pin 111 and the vertica l swinging ofdie-holder 55X on its iidrizontal pivot 57. This operation moves theparts at the lower right in Fig. 2, as above described, so that thescrew pushes treadle 34X to the left out of engagement under shoulder 40with the result that the power is disconnected from and the brakeapplied to the rotating block 11. 1

Some operators prefer shoulder 40 (Fig. 2) on the opposite or left handside of a vertical slot 39 in plate 37X. For such cases a re-arrangementof the levers can be easily made which will produce a motion of screw 70to the right instead of the left, in order to kick out the treadle bar34X from shoulder 40. In such arrangement latch 119 (Figs. 2 and 5) andsupplementary shoulder 123 will be located on the opposite side,together with such other minor details as are required for thisarrangement. Otherwise the same motion of die-holder 55X weight 107 onbar 106, and the brake details are maintained as before, being proheldup in the posiduced by pressing down the foot treadle he horizontal slotdie-holder 55X kicks out the treadle bar 34X and applies the brake 100.

It has been stated above that the (latch 15 inside die'holder 11 isreleased and the brake 100 applied when the last end of the wire pullsthrough the die, or if the wire should break in drawing. this beingbrought about by the upward swing of the dieholder 55X. The followingalso is a fact. In the event of any emergency while the block 11 is inrotationdrawing wire through the die, the operator may at any time kickout the treadle-bar 31X from shoulder- 40, which will immediatelyrelease the clutch 15 and apply brake 100 independently of any motionson the part of the die-holder 55X, with its connections for theautomatic trip. This will be evident from the drawings.

Brake construction.

- The first form is shown in Figs. 5, 6, and 8. The brake shoe is aslide 93 having lateral extensions to provide ample bearing surface andconforming to the periphery of flange 101 of block 11 against which shoe93 is pressed by helical spring 95 in holes 96 in shoe 93. A leatherfacing 100 is preferably interposed on the face of shoe 93. The brake isshown in Fig. 5 as applied to the rear side of block 11, this being aconvenient location both for the brake itself and for the operatingconnections from treadle bar 34X.

In Figs. 5 and 8 the brake is shown in action applied to block 11 undercompression of springs 95 which springs are permitted to act by theoperating connections to treadle 34X that is, by movement of lever 87 tothe left on its pivot 86 (Fig. 5).

The center of shoe 93 has a machined recess 126 (Fig. 8) to receive theupper end of lever 87, and to receive also the screw adjustmentfor thepurposes of regulating the ressure of lever 87 and of taking up wear.ghoe 93 is contained within a bracket or housing 97 secured by screws 98to table 1 of the machine. The housing is provided with a top cover 99,which is removed in Fig. 8 to show a plan of the parts inside. Housing97 is open toward block 11, and also at its bottom so that shoe 93slides directly on the finished surface of table 1 of the machine. Therear ends of springs 95 abut against the rear wall 125 of housing 97.The screw adjustment is as follows. Adjusting screw 92 extends outthrough housing rear wall 125 (Fig. 5) for ready access. Screw 92 has ashoulder which engages adjustment-block 94L which fits and is adjustablein finished shoe-recess 126 (Fig. 8).

' Adjusting block 94: is engaged by the top 88 of lever 87 in itsmovement to the right for the purpose of overcoming the compression ofsprings 95 and releasing the brake. The screw 92 extends loosely.through a recess 89 (Fig. (3) in lever-top 88, but its threads en'-gage in a lock-nut 128 and in shoe 93. There is a slight clearanceopening as shown (Fig. 5) between lock-nut 128 and lever top 88, and itis the springs 95 and not lever top 88 which press shoe 93 to the leftto its braking position. When lever-top 88 is moved to the left (Fig. 5)the compression springs 95 are freed to press shoe 93 and its facing 100against block flange 101, and the springs always, via shoe 93 and screw92, pull adjustment block 94. The only operating H10- tion required forthe brake shoe 93 upon the finished surface of table 1 is a short travelto and from block-flange 101, and that is effected at the times and bythe operating connections hereinbefore described.

In the modified construction of brake and its immediate operatingconnections shown in Figs. 11 and 12, the braking compression of springs95 is countered and the brake thereby released by means of the wedgeaction of a plunger 87A rising vertically agains adjustment block 94Awhich acts against the shoulder of adjusting screw 92 as before. In thisinstance parts 87A and 94A are constructed to. permit the wedge action,as shown. Plunger 87 A is pivoted to one end of oscillating lever 85Amounted at 86A to a leg or support 2 of the machine (Fig. 5), the otherend of the lever 85A being pivotally connected at 81A to the upper endof turn-buckle 83 of Fig. 5. lVhen plunger 87A is pulled down,compression springs 95 are free to force brake shoe 93 against blockflange 101 as before, and the construction and operation in all otherrespects is thesame as in Figs. 5, 6, and 8.

I claim- 1. In a wire-drawing machine, the combination with the.rotatable drawing block, the die-holder, means whereby the die-holdermoves away from its wire-drawing position when the tension of the wireis released, and the driving means for the drawing-block, of means forbraking the rotation of the block, and operating connections between thedieholder on one hand, and the driving and braking means on the other,said connections being arranged to be operated by said movement of thedie-holder to disconnect the driving means from the drawing block and toapply the braking means thereto.

2. In a wire-drawing machine, the combination with the rotatabledrawing-block, the die-holder and means automatically operating to movethe die-holder from its drawing position when the wire tension isreleased, of means for braking the rotation of the drawing-block, andoperating connections between. the die-holder and the braking means,said connections being operated. by said movement of. the die-holder tooperate the braking means.

3. In a wire-drawing machine, the combination with the die-holder, therotatable drawing block and driving means therefor,

of means for braking the rotation of the drawing-block, an operatorscontrol, operating connections between said control and the drivingmeans and braking means to dis-- connect the former and apply the latterand reversely; means for automatically moving the die-holder from itsdrawing position when the wire tension is released, and operatingconnections between the die-holder and operators control whereby saidmovement of the die-holder causes the operators control to operate theconnections to the driving and braking means.

4. In a wire-drawing machine, the combination with the die-holder andthe rotatable drawing block, of means for braking the rotation of thedrawing block, an operators control, operating connections between saidcontrol and the braking means; means for automatically moving thedie-holder from its drawing position when the wire-tension is released,and operating connections between the die-holder and the operatorscontrol whereby said movement of the dieholder causes the operatorscontrol to oper ate the connections to the braking means.

5. In a wire-drawing machine, the combination with the rotatabledrawing-block and separable driving means therefor, of means for brakingthe rotation of the drawing-block, said means being applied to theblock, an operators control, and operating connections between saidcontrol and the driving and braking means respectively, the

connections between the control and braking means being provided with alost motion device whereby the operators control may be operated torelease the brake without applying the power to the block.

In a wire-drawing machine, the combination with the rotatabledrawing-block and driving means therefor, and the die-holder, of meansfor braking the rotation of the driving-block, operating connections toboth the driving and braking means, a common operators control for saidrespective connections whereby the one may be operated and the operationof the other be discontinued at the will of the operator; and operatingconnections between said operators control and the die-holder wherebythe operation of the driving means is stopped and the brake appliedindependent of the will of the operator. I

7 In a wire-drawing machine, the combination with the rotatabledrawing-block, of a brake shoe conformed for braking engagementtherewith, a compression spring arranged to force said shoe against saidblock, and operating connections to said shoe Whereby' it isalternatively forced against said spring away from said block andpermitted to be forced by said spring against said block.

8. In a wire-drawing machine, the combination with the rotatabledrawing-block, of a brake constructed and arranged to have its shoeapplied to said block, a treadle lever extending below the drawing blockand brake and pivoted to the machine below the drawing-block and brake,an adjustable connection having its lower end pivoted to thetreadle-lever, and operating connections between said adjustableconnection and the shoe of the brake.

9. In a wire-drawing machine, the combination with the rotatable drawingblock, die-holder and means controlling the rotation of thedrawing-block, of operating connections between the die holder and saidcontrolling means, said means having a rigid member as a part thereof,and an adjustable weight upon said rigid member counterbalancing saiddie-holder and arranged in said operating connections to cause themovements of the die-holder away from its drawing position when the wiretension is released.

10. In a wire-drawing machine, the combination with the die-holderpivotally mounted to be movable vertically, of a vertically movablemember having a loose connection with the die-holder, a horizontaloperating connection pivoted to the lower end of said vertically movablemember, and a weight mounted on said horizontal connec--' tion tocounterbalance the die-holder.

WILLIAM D. PIERSON.

Witnesses:

F. S. VAN VALKENBURG, JAMES GAFFREY.

